Table Matrix Attribute

[TableMatrix(HorizontalTitle = "Square Celled Matrix", SquareCells = true)]
public Texture2D[,] SquareCelledMatrix;

[TableMatrix(SquareCells = true)]
public Mesh[,] PrefabMatrix;

[OnInspectorInit]
private void CreateData()
{
    SquareCelledMatrix = new Texture2D[8, 4]
    {
        { ExampleHelper.GetTexture(), null, null, null },
        { null, ExampleHelper.GetTexture(), null, null },
        { null, null, ExampleHelper.GetTexture(), null },
        { null, null, null, ExampleHelper.GetTexture() },
        { ExampleHelper.GetTexture(), null, null, null },
        { null, ExampleHelper.GetTexture(), null, null },
        { null, null, ExampleHelper.GetTexture(), null },
        { null, null, null, ExampleHelper.GetTexture() },
    };

    PrefabMatrix = new Mesh[8, 4]
    {
        { ExampleHelper.GetMesh(), null, null, null },
        { null, ExampleHelper.GetMesh(), null, null },
        { null, null, ExampleHelper.GetMesh(), null },
        { null, null, null, ExampleHelper.GetMesh() },
        { null, null, null, ExampleHelper.GetMesh() },
        { null, null, ExampleHelper.GetMesh(), null },
        { null, ExampleHelper.GetMesh(), null, null },
        { ExampleHelper.GetMesh(), null, null, null },
    };
}

[TableMatrix(HorizontalTitle = "Read Only Matrix", IsReadOnly = true)]
public int[,] ReadOnlyMatrix = new int[5, 5];

[TableMatrix(HorizontalTitle = "X axis", VerticalTitle = "Y axis")]
public InfoMessageType[,] LabledMatrix = new InfoMessageType[6, 6];

[TableMatrix(HorizontalTitle = "Custom Cell Drawing", DrawElementMethod = "DrawColoredEnumElement", ResizableColumns = false, RowHeight = 16)]
public bool[,] CustomCellDrawing;

[ShowInInspector, DoNotDrawAsReference]
[TableMatrix(HorizontalTitle = "Transposed Custom Cell Drawing", DrawElementMethod = "DrawColoredEnumElement", ResizableColumns = false, RowHeight = 16, Transpose = true)]
public bool[,] Transposed { get { return CustomCellDrawing; } set { CustomCellDrawing = value; } }

private static bool DrawColoredEnumElement(Rect rect, bool value)
{
    if (Event.current.type == EventType.MouseDown && rect.Contains(Event.current.mousePosition))
    {
        value = !value;
        GUI.changed = true;
        Event.current.Use();
    }

    UnityEditor.EditorGUI.DrawRect(rect.Padding(1), value ? new Color(0.1f, 0.8f, 0.2f) : new Color(0, 0, 0, 0.5f));

    return value;
}

[OnInspectorInit]
private void CreateData()
{
    // =)
    this.CustomCellDrawing = new bool[15, 15];
    this.CustomCellDrawing[6, 5] = true;
    this.CustomCellDrawing[6, 6] = true;
    this.CustomCellDrawing[6, 7] = true;
    this.CustomCellDrawing[8, 5] = true;
    this.CustomCellDrawing[8, 6] = true;
    this.CustomCellDrawing[8, 7] = true;
    this.CustomCellDrawing[5, 9] = true;
    this.CustomCellDrawing[5, 10] = true;
    this.CustomCellDrawing[9, 9] = true;
    this.CustomCellDrawing[9, 10] = true;
    this.CustomCellDrawing[6, 11] = true;
    this.CustomCellDrawing[7, 11] = true;
    this.CustomCellDrawing[8, 11] = true;
}